DISTANCE EDUCATION
M.Sc. Botany DEGREE EXAMINATION, DECEMBER 2017.
PLANT DIVERSITY
(Specialization Plant Biotechnology)
(2008 onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
x 20 100)
1. Explain thallus organization in algae giving
suitable examples.
Write a comparative account on life cycle patterns
in algae.
How will you cultivate microalgae?
2. Trace thallus organization in Fungi from Class.
Phycomycetes to Deuteromycetes.
Comment on the types of asexual spores formed by
fungi and explain the mechanism of their dispersal.

Schematically represent the life cycle patterns in
fungi.
Sub. Code
11
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3. Describe the internal structure of lichen thallus
with suitable illustration.
How do lichens multiply vegetatively?
Classify lichens based on their habitat and thallus
forms.
4. Trace the structural variations of gametophytes in
Marchantiales, Jungermaniales and Sphagnales.
Compare the structure of sporophyte in
Anthocerotales and Bryales.
Outline Watson (1964) system of classification of
Bryophytes.
5. Enlist the salient characteristics of Pteridophytes
belonging to Psilopsida and Lycopsida.
Write a note on the types of fossils found in
pteridophytes.
What is meant by alternation of generation?
Represent it with a life cycle of a heterosporous
vascular cryptogam.
6. Enlist the features of differences and resemblances
between Gymnosperms and Pteridophyes.
Give a comparative account on the characteristics of
Ginkoales and Gnetales.
Bring out the features of Cycadeoidea.
7. Outline the classification of fungi according to
Alexopolous and Mims (1979).
Give an account of fossil Pteridophytes.
Trace the evolutionary tendencies in Gymnosperms.

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WK 6
8. Explain sexual reproduction in fungi belonging to
the class Ascomycetes and Basidiomycetes.
Comment on Mariculture and its significance.
In what aspects do bryophytes resemble algae?
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